tfocs_initialize bug

[Martinchen2015]

When I run matrix completion solver on Matlab 2016b or newer, it gave the following error info:
Error using nargin
You can only call nargin/nargout from within a MATLAB function.

Error in tfocs_initialize (line 43)
if nargin < 1 || ( nargin ==1 && isstruct( smoothF ) )

Error in tfocs_AT (line 13)
tfocs_initialize

Error in tfocs (line 105)
[ varargout{1:max(nargout,1)} ] = feval( [ 'tfocs_', alg ], smoothF, affineF, projectorF, x0, opts );

Error in tfocs_SCD (line 118)
[ z, odata, opts ] = tfocs( smoothF, affineF, dualproxF, z0, opts );

Error in solver_sNuclearBP (line 82)
tfocs_SCD( prox, { A, -b }, proj_Rn, mu, x0, z0, opts, varargin{:} );

Error in P3 (line 20)
Xk = solver_sNuclearBP( {N,N,omega}, observations, mu );

However, the same code works well on version 2015b. I did not try version by version but the bug seems happen because the way Matlab platform identity script or function has changed in some newer release.

[matthewoshaughnessy]

I just ran into this same issue (using R2016b) and was able to solve it by adding tfocs_nargin = nargin; tfocs_nargout = nargout; immediately before tfocs_initialize is called in tfocs_AT.m, then replacing all instances of nargin with tfocs_nargin and nargout with tfocs_nargout in tfocs_initialize.m. That was enough to solve the issue for me, but maybe there are other places in the package that need a similar fix.

[stephenbeckr]

Thanks to both of you for noticing. Someone else noticed earlier and we actually pushed a fix to github in November, and the recent "2017 release" v1.4.1 .zip on github contains this fix, so download the most recent version of TFOCS should fix it. I did notice that our link to the zip file on cvxr.com is an old one (http://cvxr.com/tfocs/download/) that points to the buggy version, so I will update that link!

[matthewoshaughnessy]

Thank you Stephen!